Aquatic Mosquito Control General Permit
We issue this permit to allow the discharge of insecticides into state waters to control mosquitoes. It is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit.
The current permit went into effect July 5, 2019, and expires July 4, 2024.
Español: Para obtener más información, comuníquese con Shawn Ultican al 360-870-3492.
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Permit reissuance
We are pleased to announce that the draft Aquatic Mosquito Control General Permit is available for public comment. We invite comments on the draft permit documents beginning Nov. 15, 2023 until 11:59 p.m., Dec. 29, 2023. After the close of the comment period, we will publish a Response to Comments as an appendix to the fact sheet to address comments submitted during the public comment period.
We are in the process of permit reissuance
We invited comments on the draft general permit documents from Nov. 15, 2023, until Dec. 29, 2023. We also held online workshops and public hearings. During the workshops in December, we explained the proposed changes to the permit and answered questions. The hearings began immediately following the public workshops.
Public hearing presentation slides
Draft permit documents
- Draft Aquatic Mosquito Control General Permit
- Fact Sheet
- Draft Permit Application (Notice of Intent)
- Draft Signage Template (for public notifications)
- Small Business Economic Impact Analysis
- State Register Notice
- SEPA Checklist
- SEPA Determination of Non-Significance
Current permit documents
- Current Permit (effective July 5, 2019)
- Fact Sheet: Our detailed explanation of the permit
- Appendix B: Response to public comments on the 2019 permit
- Interactive map (WDFW): Areas with restricted larvicide and adulticide use
- Small Business Economic Impact Statement
Permit coverage information
Mosquito control resources
- Check WDFW's Areas of Restricted Larvicide and Adulticide Use map, select the “Mosquito Control” tab above the map.
- Consult our guidance on Best Management Practices for Mosquito Control.
Related links
Contact information
Shawn Ultican
Aquatic Pesticide Permit Specialist
shawn.ultican@ecy.wa.gov
360-870-3492